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# A worker tries to move a rock by applying a 360-N force to a steelbar as shown. (a)

ISBN: 9780073398242 490

## Solution for problem 3.85 Chapter 3

Vector Mechanics for Engineers: Statics and Dynamics | 11th Edition

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Vector Mechanics for Engineers: Statics and Dynamics | 11th Edition

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Problem 3.85

A worker tries to move a rock by applying a 360-N force to a steelbar as shown. (a) Replace that force with an equivalent force-couplesystem at D. (b) Two workers attempt to move the same rock byapplying a vertical force at A and another force at D. Determine thesetwo forces if they are to be equivalent to the single force of part a.

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Step 1 of 3

Systems Wednesday, March 9, 22:43 PM • System ○ Definition: a domain of investigation ○ Thermodynamic System: the collection of matter or region of space ○ To define a system, must also define the environment or surroundings ○ Zero mathematical thickness of a system ○ The boundary is shared by both system and surroundings ○ Properties vary continuously across the surface of the boundary § There is no jump in properties across the boundary ○ Types: § Isolated □ A system that doesn’t allow transfe

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A worker tries to move a rock by applying a 360-N force to a steelbar as shown. (a)